L4Re/departure

Annotated libe2access/lib/src/format.c

226:8ad94f3addb2
2021-12-28 Paul Boddie Updated libe2access sources and added host-based programs and tests.
paul@181 1
/*
paul@181 2
 * File metadata formatting.
paul@181 3
 *
paul@226 4
 * Copyright (C) 2019, 2021 Paul Boddie <paul@boddie.org.uk>
paul@181 5
 *
paul@181 6
 * This program is free software; you can redistribute it and/or
paul@181 7
 * modify it under the terms of the GNU General Public License as
paul@181 8
 * published by the Free Software Foundation; either version 2 of
paul@181 9
 * the License, or (at your option) any later version.
paul@181 10
 *
paul@181 11
 * This program is distributed in the hope that it will be useful,
paul@181 12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
paul@181 13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
paul@181 14
 * GNU General Public License for more details.
paul@181 15
 *
paul@181 16
 * You should have received a copy of the GNU General Public License
paul@181 17
 * along with this program; if not, write to the Free Software
paul@181 18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
paul@181 19
 * Boston, MA  02110-1301, USA
paul@181 20
 */
paul@181 21
paul@181 22
#include "format.h"
paul@181 23
paul@181 24
paul@181 25
paul@181 26
/* Return the permissions of an object as a string. */
paul@181 27
paul@181 28
char *get_permission_string(uint16_t permissions)
paul@181 29
{ 
paul@226 30
  static char s[11] = "---------\0";
paul@181 31
  static char letters[] = "rwx";
paul@181 32
  int i, letter;
paul@181 33
  uint16_t selector = 0400;
paul@181 34
paul@226 35
  for (i = 0, letter = 0; i < 10; i++, letter = (letter + 1) % 3, selector >>= 1)
paul@181 36
    s[i] = permissions & selector ? letters[letter] : '-';
paul@181 37
paul@181 38
  return s;
paul@181 39
}